I have an I4 4x4 Limited. My last 2 fill ups have resulted in an average of about 20mpg...that's with probably 35% highway, 65% city. That seems awfully low considering that it's rated at 23/27. Can I expect much better mileage after the car breaks in more (currently at 1K) or once the weather warms up (currently below freezing most of the time)? One of the main reasons I traded in my 4Runner for this car was for the improved mileage, but this is really not much better than what I got with the 4Runner.